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${{\mathit \Delta}}$ BARYONS ($\mathit S$ = 0, $\mathit I$ = 3/2) ${{\mathit \Delta}^{++}}$ = ${{\mathit u}}{{\mathit u}}{{\mathit u}}$, ${{\mathit \Delta}^{+}}$ = ${\mathit {\mathit u}}$ ${\mathit {\mathit u}}$ ${\mathit {\mathit d}}$, ${{\mathit \Delta}^{0}}$ = ${\mathit {\mathit u}}$ ${\mathit {\mathit d}}$ ${\mathit {\mathit d}}$, ${{\mathit \Delta}^{-}}$ = ${\mathit {\mathit d}}$ ${\mathit {\mathit d}}$ ${\mathit {\mathit d}}$

INSPIRE   JSON PDGID: B082

${{\mathit \Delta}{(1620)}}$ $I(J^P)$ = $3/2(1/2^{-})$

Older and obsolete values are listed and referenced in the 2014 edition, Chinese Physics C38 070001 (2014).

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▸  exp ${{\mathit \Delta}{(1620)}}$ POLE POSITION

REAL PART 1590 TO 1610 $(\approx 1600 )$ MeV

$-2{\times }$IMAGINARY PART 80 TO 140 $(\approx 110 )$ MeV

▸  exp ${{\mathit \Delta}{(1620)}}$ ELASTIC POLE RESIDUE

MODULUS $\vert \mathit r\vert $ 10 TO 20 $(\approx 15 )$ MeV

PHASE $\theta $ -120 TO -80 $(\approx -100 )$ $^\circ{}$

▸  exp ${{\mathit \Delta}{(1620)}}$ INELASTIC POLE RESIDUE

Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \Delta}{(1620)}}$ $\rightarrow$ ${{\mathit \Delta}}{{\mathit \pi}}$, ${\mathit D}{\mathrm -wave}$

Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \Delta}{(1620)}}$ $\rightarrow$ ${{\mathit \Sigma}}{{\mathit K}}$

Normalized residue in ${{\mathit N}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \Delta}{(1620)}}$ $\rightarrow$ ${{\mathit N}{(1440)}}{{\mathit \pi}}$

${{\mathit \Delta}{(1620)}}$ BREIT-WIGNER MASS 1590 TO 1630 $(\approx 1610 )$ MeV

${{\mathit \Delta}{(1620)}}$ BREIT-WIGNER WIDTH 110 TO 150 $(\approx 130 )$ MeV

▸  exp ${{\mathit \Delta}{(1620)}}$ PHOTON DECAY AMPLITUDES AT THE POLE

${{\mathit \Delta}{(1620)}}$ $\rightarrow$ ${{\mathit N}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$

▸  exp ${{\mathit \Delta}{(1620)}}$ BREIT-WIGNER PHOTON DECAY AMPLITUDES

${{\mathit \Delta}{(1620)}}$ $\rightarrow$ ${{\mathit N}}{{\mathit \gamma}}$ , helicity-1/2 amplitude A$_{1/2}$ 0.030 TO 0.060 $(\approx 0.050 )$ GeV${}^{−1/2}$

${{\mathit \Delta}{(1620)}}$ DECAY MODES
The following branching fractions are our estimates, not fits or averages.
Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ ${{\mathit N}}{{\mathit \pi}}$ $(25 - 35) \%$ 520   $\Gamma_{2}$ ${{\mathit N}}{{\mathit \pi}}{{\mathit \pi}}$ >67 $\%$ 484   $\Gamma_{3}$ ${{\mathit \Delta}{(1232)}}{{\mathit \pi}}$ , ${\mathit D}{\mathrm -wave}$ $(44-72) \%$ 311   $\Gamma_{4}$ ${{\mathit N}}{{\mathit \rho}}$ $(23 - 32) \%$ -1   $\Gamma_{5}$ ${{\mathit N}}{{\mathit \rho}}$ , $\mathit S$=1/2, ${\mathit S}{\mathrm -wave}$ $(23 - 32) \%$ -1   $\Gamma_{6}$ ${{\mathit N}}{{\mathit \rho}}$ , $\mathit S$=3/2, ${\mathit D}{\mathrm -wave}$ <0.04 $\%$ -1   $\Gamma_{7}$ ${{\mathit N}{(1440)}}{{\mathit \pi}}$ <9 $\%$ 98   $\Gamma_{8}$ ${{\mathit N}}{{\mathit \gamma}}$ , helicity=1/2 $(0.03 - 0.10) \%$ 532